题目内容
--- What were you and your cousin doing at this time yesterday?
--- He was reading a magazine ________ I was writing an e-mail.
A. as B. while C. when D. after
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题目内容
--- What were you and your cousin doing at this time yesterday?
--- He was reading a magazine ________ I was writing an e-mail.
A. as B. while C. when D. after